Thanks for the response!! I purchased the sword from Duke Gibson, brother of Bill Gibson, who are decendents of General T.L. Clingman. I purchased a U.S. marked 1851 Colt Navy serial number 58148 from Bill. After much research, I have found that their Great-Great Grandfather was married to Clingmans sister. Duke said his father told him of the history on these items and the sword was said to be a "Dress Sword". The sword belt is in a museum in Texas along with another gun of his.
Here is a close up of the pommel: